Aweber Hosted Autoresponder offers a 30 day money back guarantee that they call a “Free 30 Day Test Drive”. Aweber Pricing starts at $19/month and is based on total number of subscribers, you will only have to pay more as your list grows past 500 subscribers. Aweber service (as they claim) has 99.34% delivery rate. That means that practically all of your subscribers will get your message! Full Review